COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

Reducing mass flow rate with increase in pressure ratio

Fixed mass flow rate regardless of pressure ratio

No flow of air

Increased inclination of chord with air steam

Gas turbine's blade will appear as impulse section at the hub and as a reaction section at tip

Gas turbines have their blades similar to steam turbine

Large gas turbines use radial inflow turbines

Gas turbines use both air and liquid cooling

Zero

Less

Same

More

Net work output and isentropic heat drop

Net work output and heat supplied

Net work output and work done by turbine

Actual heat drop and isentropic heat drop

1 - k + k (p₁/p₂) n- 1/n

1 - k + k (p₁/p₂)1/n

1 + k - k (p₂/p₁)1/n

1 + k - k (p₂/p₁) n-1/n

Provide robust structure

Convert kinetic energy of air into pressure energy

Beautify the shape

Collect more air

None of these

Compressor capacity

Free air delivery

Swept volume

(v₁² -v₂²)/g

(v₁ - v₂)²/2g

(v₁ - v₂)²/g

(v₁² -v₂²)/2g

Decreases heat loss is exhaust

Allows operation at very high altitudes

Allows high compression ratio

Increases thermal efficiency

Compressor

Gas turbine

Air motor

I.C engine